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Zhou M, Wei Y, Feng Y, Zhang S, Ma N, Wang K, Tan P, Zhao Y, Zhao J, Ma X. Arginine Regulates Skeletal Muscle Fiber Type Formation via mTOR Signaling Pathway. Int J Mol Sci 2024; 25:6184. [PMID: 38892371 PMCID: PMC11173221 DOI: 10.3390/ijms25116184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 05/28/2024] [Accepted: 05/31/2024] [Indexed: 06/21/2024] Open
Abstract
The composition of skeletal muscle fiber types affects the quality of livestock meat and human athletic performance and health. L-arginine (Arg), a semi-essential amino acid, has been observed to promote the formation of slow-twitch muscle fibers in animal models. However, the precise molecular mechanisms are still unclear. This study investigates the role of Arg in skeletal muscle fiber composition and mitochondrial function through the mTOR signaling pathway. In vivo, 4-week C56BL/6J male mice were divided into three treatment groups and fed a basal diet supplemented with different concentrations of Arg in their drinking water. The trial lasted 7 weeks. The results show that Arg supplementation significantly improved endurance exercise performance, along with increased SDH enzyme activity and upregulated expression of the MyHC I, MyHC IIA, PGC-1α, and NRF1 genes in the gastrocnemius (GAS) and quadriceps (QUA) muscles compared to the control group. In addition, Arg activated the mTOR signaling pathway in the skeletal muscle of mice. In vitro experiments using cultured C2C12 myotubes demonstrated that Arg elevated the expression of slow-fiber genes (MyHC I and Tnnt1) as well as mitochondrial genes (PGC-1α, TFAM, MEF2C, and NRF1), whereas the effects of Arg were inhibited by the mTOR inhibitor rapamycin. In conclusion, these findings suggest that Arg modulates skeletal muscle fiber type towards slow-twitch fibers and enhances mitochondrial functions by upregulating gene expression through the mTOR signaling pathway.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Xi Ma
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (M.Z.); (Y.W.); (Y.F.); (S.Z.); (N.M.); (K.W.); (P.T.); (Y.Z.); (J.Z.)
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Karasawa T, Hee Choi R, Meza CA, Maschek JA, Cox JE, Funai K. Skeletal muscle PGC-1α remodels mitochondrial phospholipidome but does not alter energy efficiency for ATP synthesis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.22.595374. [PMID: 38826268 PMCID: PMC11142218 DOI: 10.1101/2024.05.22.595374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
Background Exercise training is thought to improve the mitochondrial energy efficiency of skeletal muscle. Some studies suggest exercise training increases the efficiency for ATP synthesis by oxidative phosphorylation (OXPHOS), but the molecular mechanisms are unclear. We have previously shown that exercise remodels the lipid composition of mitochondrial membranes, and some of these changes could contribute to improved OXPHOS efficiency (ATP produced by O2 consumed or P/O). Peroxisome proliferator-activated receptor gamma coactivator-1 alpha (PGC-1α) is a transcriptional co-activator that coordinately regulates exercise-induced adaptations including mitochondria. We hypothesized that increased PGC-1α activity is sufficient to remodel mitochondrial membrane lipids and promote energy efficiency. Methods Mice with skeletal muscle-specific overexpression of PGC-1α (MCK-PGC-1α) and their wildtype littermates were used for this study. Lipid mass spectrometry and quantitative PCR were used to assess muscle mitochondrial lipid composition and their biosynthesis pathway. The abundance of OXPHOS enzymes was determined by western blot assay. High-resolution respirometry and fluorometry analysis were used to characterize mitochondrial bioenergetics (ATP production, O2 consumption, and P/O) for permeabilized fibers and isolated mitochondria. Results Lipidomic analyses of skeletal muscle mitochondria from wildtype and MCK-PGC-1α mice revealed that PGC-1α increases the concentrations of cone-shaped lipids such as phosphatidylethanolamine (PE), cardiolipin (CL), and lysophospholipids, while decreases the concentrations of phosphatidylcholine (PC), phosphatidylinositol (PI) and phosphatidic acid (PA). However, while PGC-1α overexpression increased the abundance of OXPHOS enzymes in skeletal muscle and the rate of O2 consumption (JO2), P/O values were unaffected with PGC-1α in permeabilized fibers or isolated mitochondria. Conclusions Collectively, overexpression of PGC-1α promotes the biosynthesis of mitochondrial PE and CL but neither PGC-1α nor the mitochondrial membrane lipid remodeling induced in MCK-PGC-1α mice is sufficient to increase the efficiency for mitochondrial ATP synthesis. These findings suggest that exercise training may increase OXPHOS efficiency by a PGC-1α-independent mechanism, and question the hypothesis that mitochondrial lipids directly affect OXPHOS enzymes to improve efficiency for ATP synthesis.
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Affiliation(s)
- Takuya Karasawa
- Diabetes & Metabolism Research Center, University of Utah, Utah, United States
- Department of Nutrition & Integrative Physiology, University of Utah, Utah, United States
- Research Institute for Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - Ran Hee Choi
- Diabetes & Metabolism Research Center, University of Utah, Utah, United States
- Department of Nutrition & Integrative Physiology, University of Utah, Utah, United States
| | - Cesar A. Meza
- Diabetes & Metabolism Research Center, University of Utah, Utah, United States
- Department of Nutrition & Integrative Physiology, University of Utah, Utah, United States
| | - J. Alan Maschek
- Diabetes & Metabolism Research Center, University of Utah, Utah, United States
- Metabolomics Core Research Facility, University of Utah, Utah, United States
| | - James E. Cox
- Diabetes & Metabolism Research Center, University of Utah, Utah, United States
- Metabolomics Core Research Facility, University of Utah, Utah, United States
| | - Katsuhiko Funai
- Diabetes & Metabolism Research Center, University of Utah, Utah, United States
- Department of Nutrition & Integrative Physiology, University of Utah, Utah, United States
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3
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Elowe CR, Stager M, Gerson AR. Sarcolipin relates to fattening, but not sarco/endoplasmic reticulum Ca2+-ATPase uncoupling, in captive migratory gray catbirds. J Exp Biol 2024; 227:jeb246897. [PMID: 38044822 DOI: 10.1242/jeb.246897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 11/24/2023] [Indexed: 12/05/2023]
Abstract
In order to complete their energetically demanding journeys, migratory birds undergo a suite of physiological changes to prepare for long-duration endurance flight, including hyperphagia, fat deposition, reliance on fat as a fuel source, and flight muscle hypertrophy. In mammalian muscle, SLN is a small regulatory protein which binds to sarco/endoplasmic reticulum Ca2+-ATPase (SERCA) and uncouples Ca2+ transport from ATP hydrolysis, increasing energy consumption, heat production, and cytosolic Ca2+ transients that signal for mitochondrial biogenesis, fatigue resistance and a shift to fatty acid oxidation. Using a photoperiod manipulation of captive gray catbirds (Dumetella carolinensis), we investigated whether SLN may play a role in coordinating the development of the migratory phenotype. In response to long-day photostimulation, catbirds demonstrated migratory restlessness and significant body fat stores, alongside higher SLN transcription while SERCA2 remained constant. SLN transcription was strongly correlated with h-FABP and PGC1α transcription, as well as fat mass. However, SLN was not significantly correlated with HOAD or CD36 transcripts or measurements of SERCA activity, SR membrane Ca2+ leak, Ca2+ uptake rates, pumping efficiency or mitochondrial biogenesis. Therefore, SLN may be involved in the process of storing fat and shifting to fat as a fuel, but the mechanism of its involvement remains unclear.
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Affiliation(s)
- Cory R Elowe
- Department of Biology, University of Massachusetts, 221 Morrill Science Center III, 611 North Pleasant Street, Amherst, MA 01003-9297, USA
- Organismic and Evolutionary Biology Graduate Program, University of Massachusetts, Amherst, MA 01003-9316, USA
| | - Maria Stager
- Department of Biology, University of Massachusetts, 221 Morrill Science Center III, 611 North Pleasant Street, Amherst, MA 01003-9297, USA
- Organismic and Evolutionary Biology Graduate Program, University of Massachusetts, Amherst, MA 01003-9316, USA
| | - Alexander R Gerson
- Department of Biology, University of Massachusetts, 221 Morrill Science Center III, 611 North Pleasant Street, Amherst, MA 01003-9297, USA
- Organismic and Evolutionary Biology Graduate Program, University of Massachusetts, Amherst, MA 01003-9316, USA
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Zhang J, Li J, Liu Y, Liang R, Mao Y, Yang X, Zhang Y, Zhu L. Effect of resveratrol on skeletal slow-twitch muscle fiber expression via AMPK/PGC-1α signaling pathway in bovine myotubes. Meat Sci 2023; 204:109287. [PMID: 37490793 DOI: 10.1016/j.meatsci.2023.109287] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 06/14/2023] [Accepted: 07/18/2023] [Indexed: 07/27/2023]
Abstract
The purpose of this study was to evaluate the impact of resveratrol on slow-twitch muscle fiber expression in bovine myotubes. The results revealed that resveratrol enhanced slow myosin heavy chain (MyHC) and suppressed fast MyHC protein expression, accompanied by increased MyHC I/IIa and decreased MyHC IIx/IIb mRNA levels in bovine myotubes (P < 0.05). Resveratrol also enhanced the activities of succinic dehydrogenase (SDH), malate dehydrogenase (MDH) and the mitochondrial DNA (mtDNA) content, but reduced lactate dehydrogenase (LDH) activity (P < 0.05). Meanwhile, the protein and gene expression of AMPK, SIRT1 and PGC-1α were upregulated by resveratrol (P < 0.05). Furthermore, PGC-1α inhibitor SR-18292 could attenuate resveratrol-induced muscle fiber conversion from fast-twitch to slow-twitch. These results suggest that resveratrol might promote muscle fiber type transition from fast-twitch to slow-twitch through the AMPK/PGC-1α signaling pathway and mitochondrial biogenesis in bovine myotubes.
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Affiliation(s)
- Jingyue Zhang
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; National R&D Center for Beef Processing Technology, Tai'an, Shandong 271018, PR China
| | - Jiqiang Li
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; National R&D Center for Beef Processing Technology, Tai'an, Shandong 271018, PR China
| | - Yunge Liu
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; National R&D Center for Beef Processing Technology, Tai'an, Shandong 271018, PR China
| | - Rongrong Liang
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; National R&D Center for Beef Processing Technology, Tai'an, Shandong 271018, PR China
| | - Yanwei Mao
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; National R&D Center for Beef Processing Technology, Tai'an, Shandong 271018, PR China
| | - Xiaoyin Yang
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; National R&D Center for Beef Processing Technology, Tai'an, Shandong 271018, PR China
| | - Yimin Zhang
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; National R&D Center for Beef Processing Technology, Tai'an, Shandong 271018, PR China
| | - Lixian Zhu
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; National R&D Center for Beef Processing Technology, Tai'an, Shandong 271018, PR China.
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Gorza L, Germinario E, Vitadello M, Guerra I, De Majo F, Gasparella F, Caliceti P, Vitiello L, Danieli-Betto D. Curcumin Administration Improves Force of mdx Dystrophic Diaphragm by Acting on Fiber-Type Composition, Myosin Nitrotyrosination and SERCA1 Protein Levels. Antioxidants (Basel) 2023; 12:1181. [PMID: 37371910 DOI: 10.3390/antiox12061181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/25/2023] [Accepted: 05/29/2023] [Indexed: 06/29/2023] Open
Abstract
The vegetal polyphenol curcumin displays beneficial effects against skeletal muscle derangement induced by oxidative stress, disuse or aging. Since oxidative stress and inflammation are involved in the progression of muscle dystrophy, the effects of curcumin administration were investigated in the diaphragm of mdx mice injected intraperitoneally or subcutaneously with curcumin for 4-12-24 weeks. Curcumin treatment independently of the way and duration of administration (i) ameliorated myofiber maturation index without affecting myofiber necrosis, inflammation and degree of fibrosis; (ii) counteracted the decrease in type 2X and 2B fiber percentage; (iii) increased about 30% both twitch and tetanic tensions of diaphragm strips; (iv) reduced myosin nitrotyrosination and tropomyosin oxidation; (v) acted on two opposite nNOS regulators by decreasing active AMP-Kinase and increasing SERCA1 protein levels, the latter effect being detectable also in myotube cultures from mdx satellite cells. Interestingly, increased contractility, decreased myosin nitrotyrosination and SERCA1 upregulation were also detectable in the mdx diaphragm after a 4-week administration of the NOS inhibitor 7-Nitroindazole, and were not improved further by a combined treatment. In conclusion, curcumin has beneficial effects on the dystrophic muscle, mechanistically acting for the containment of a deregulated nNOS activity.
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Affiliation(s)
- Luisa Gorza
- Department of Biomedical Sciences, University of Padova, 35131 Padova, Italy
| | - Elena Germinario
- Department of Biomedical Sciences, University of Padova, 35131 Padova, Italy
| | - Maurizio Vitadello
- Department of Biomedical Sciences, University of Padova, 35131 Padova, Italy
| | - Irene Guerra
- Department of Biomedical Sciences, University of Padova, 35131 Padova, Italy
| | - Federica De Majo
- Department of Biomedical Sciences, University of Padova, 35131 Padova, Italy
| | | | - Paolo Caliceti
- Department of Pharmaceutical Sciences, University of Padova, 35131 Padova, Italy
| | - Libero Vitiello
- Department of Biology, University of Padova, 35131 Padova, Italy
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Boesch J, Pierrel E, Lambert C, Doelemeyer A, Kreider J, Accart N, Summermatter S. Chemokine-like receptor 1 plays a critical role in modulating the regenerative and contractile properties of muscle tissue. Front Physiol 2022; 13:1044488. [PMID: 36467705 PMCID: PMC9713634 DOI: 10.3389/fphys.2022.1044488] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 11/04/2022] [Indexed: 10/28/2023] Open
Abstract
Musculoskeletal diseases are a leading contributor to mobility disability worldwide. Since the majority of patients with musculoskeletal diseases present with associated muscle weakness, treatment approaches typically comprise an element of resistance training to restore physical strength. The health-promoting effects of resistance exercise are mediated via complex, multifarious mechanisms including modulation of systemic and local inflammation. Here we investigated whether targeted inhibition of the chemerin pathway, which largely controls inflammatory processes via chemokine-like receptor 1 (CMKLR1), can improve skeletal muscle function. Using genetically modified mice, we demonstrate that blockade of CMKLR1 transiently increases maximal strength during growth, but lastingly decreases strength endurance. In-depth analyses of the underlying long-term adaptations revealed microscopic alterations in the number of Pax7-positive satellite cells, as well as molecular changes in genes governing myogenesis and calcium handling. Taken together, these data provide evidence of a critical role for CMKLR1 in regulating skeletal muscle function by modulating the regenerative and contractile properties of muscle tissue. CMKLR1 antagonists are increasingly viewed as therapeutic modalities for a variety of diseases (e.g., psoriasis, metabolic disorders, and multiple sclerosis). Our findings thus have implications for the development of novel drug substances that aim at targeting the chemerin pathway for musculoskeletal or other diseases.
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Affiliation(s)
| | | | | | | | | | | | - Serge Summermatter
- Musculoskeletal Diseases, Novartis Institutes for Biomedical Research, Novartis Pharma AG, Basel, Switzerland
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Held S, Speer K, Rappelt L, Wicker P, Donath L. The effectiveness of traditional vs. velocity-based strength training on explosive and maximal strength performance: A network meta-analysis. Front Physiol 2022; 13:926972. [PMID: 36035476 PMCID: PMC9399433 DOI: 10.3389/fphys.2022.926972] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 07/11/2022] [Indexed: 11/13/2022] Open
Abstract
This network meta-analysis aimed at evaluating the effectiveness of different velocity-based (VBT) and traditional 1RM-based resistance training (TRT) interventions on strength and power indices in healthy participants. The research was conducted until December 2021 using the online electronic databases PubMed, Web of Science, PsycNet, and SPORTDiscus for studies with the following inclusion criteria: 1) controlled VBT trials, 2) strength and/or jump and/or sprint parameters as outcomes (c), participants aged between 18 and 40 years, and 4) peer-reviewed and published in English. Standardized mean differences (SMD) using a random effects models were calculated. Fourteen studies with 311 healthy participants were selected and 3 networks (strength, jump, and sprint) were achieved. VBT, TRT, repetitions in reserve (RIR), low velocity loss (lowVL), and high velocity loss (highVL) were ranked for each network. Based on P-score rankings, lowVL (P-score ≥ 0.59; SMD ≥ 0.33) and highVL (P-score ≥ 0.50; SMD ≥ 0.12) revealed favorable effects on strength, jump, and sprint performance compared to VBT (P-score ≤ 0.47; SMD ≤0.01), TRT (P-score ≤0.46; SMD ≤ 0.00), and RIR (P-score ≤ 0.46; SMD ≤ 0.12). In conclusion, lowVL and highVL showed notable effects on strength, jump, and sprint performance. In particular for jump performance, lowVL induced favorable improvements compared to all other resistance training approaches.
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Affiliation(s)
- Steffen Held
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany
| | - Kevin Speer
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany
| | - Ludwig Rappelt
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany
| | - Pamela Wicker
- Department of Sports Science, Bielefeld University, Bielefeld, Germany
- *Correspondence: Pamela Wicker,
| | - Lars Donath
- Department of Intervention Research in Exercise Training, German Sport University Cologne, Cologne, Germany
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8
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Mansingh S, Handschin C. Time to Train: The Involvement of the Molecular Clock in Exercise Adaptation of Skeletal Muscle. Front Physiol 2022; 13:902031. [PMID: 35547572 PMCID: PMC9081842 DOI: 10.3389/fphys.2022.902031] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 04/08/2022] [Indexed: 11/23/2022] Open
Abstract
Circadian rhythms regulate a host of physiological processes in a time-dependent manner to maintain homeostasis in response to various environmental stimuli like day and night cycles, food intake, and physical activity. Disruptions in circadian rhythms due to genetic mutations, shift work, exposure to artificial light sources, aberrant eating habits, and abnormal sleep cycles can have dire consequences for health. Importantly, exercise training efficiently ameliorates many of these adverse effects and the role of skeletal muscle in mediating the benefits of exercise is a topic of great interest. However, the molecular and physiological interactions between the clock, skeletal muscle function and exercise are poorly understood, and are most likely a combination of molecular clock components directly acting in muscle as well as in concordance with other peripheral metabolic organ systems like the liver. This review aims to consolidate existing experimental evidence on the involvement of molecular clock factors in exercise adaptation of skeletal muscle and to highlight the existing gaps in knowledge that need to be investigated to develop therapeutic avenues for diseases that are associated with these systems.
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9
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Elowe CR, Gerson AR. Migratory disposition alters lean mass dynamics and protein metabolism in migratory White-throated Sparrows ( Zonotrichia albicollis). Am J Physiol Regul Integr Comp Physiol 2022; 323:R98-R109. [PMID: 35503523 DOI: 10.1152/ajpregu.00295.2021] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Migratory birds seasonally increase fat stores and the capacity to use fat to fuel long-distance migratory flights. However, lean mass loss also occurs during migratory flights and, if adaptive, should exhibit seasonal changes in the capacity for protein metabolism. We conducted a photoperiod manipulation using captive White-throated Sparrows (Zonotrichia albicollis) to investigate seasonal changes in protein metabolism between the non-migratory "winter" condition and after exposure to a long-day "spring" photoperiod to stimulate the migratory condition. After photostimulation, birds in the migratory condition rapidly increased fat mass and activity of fat catabolism enzymes. Meanwhile, total lean mass did not change, but birds increased activity of protein catabolism enzymes and lost more water and lean mass during water-restricted metabolic testing. These data suggest that more protein may be catabolized during migratory seasons, corresponding with more water loss. Counter to predictions, birds in the migratory condition also showed an approximately 30-fold increase in muscle expression of sarcolipin, which binds to sarco/endoplasmic reticulum Ca2+ ATPase (SERCA) and uncouples Ca2+ transport from ATP hydrolysis. Our documented changes to protein catabolism enzymes and whole-animal lean mass dynamics may indicate protein breakdown or increased protein turnover is adaptive during migration in songbirds.
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Affiliation(s)
- Cory R Elowe
- Department of Biology, University of Massachusetts Amherst, Amherst, MA, United States.,Organismic and Evolutionary Biology Graduate Program, University of Massachusetts Amherst, Amherst, MA, United States
| | - Alexander R Gerson
- Department of Biology, University of Massachusetts Amherst, Amherst, MA, United States.,Organismic and Evolutionary Biology Graduate Program, University of Massachusetts Amherst, Amherst, MA, United States
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Xue Y, Huang Z, Chen X, Jia G, Zhao H, Liu G. Naringin induces skeletal muscle fiber type transformation via AMPK/PGC-1α signaling pathway in mice and C2C12 myotubes. Nutr Res 2021; 92:99-108. [PMID: 34284270 DOI: 10.1016/j.nutres.2021.06.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/17/2021] [Accepted: 06/17/2021] [Indexed: 01/14/2023]
Abstract
A large number of studies have shown that polyphenols can regulate skeletal muscle fiber type transformation through AMPK signal. However, the effects and mechanism of naringin (a natural polyphenol) on muscle fiber type transformation still remains unclear. Thus, we hypothesized that naringin would induce the transformation of skeletal muscle fibers from type II to type I by AMPK signaling. C2C12 myotubes and BALB/c mice models were used to test this hypothesis. We found that naringin significantly increased the protein expression of slow myosin heavy chain (MyHC), myoglobin and troponin I type I slow skeletal (Troponin I-SS) and the activities of succinate dehydrogenase (SDH) and malate dehydrogenase (MDH), and significantly decreased fast MyHC protein expression and lactate dehydrogenase (LDH) activity, accompanied by the activation of AMPK and the activity of peroxisome proliferator activated receptor-γ coactivator-1α (PGC-1α) in mice and C2C12 myotubes. Further inhibition of AMPK activity by compound C showed that the above effects were significantly inhibited in C2C12 myotubes. In conclusion, naringin promotes the transformation of skeletal muscle fibers from type II to type I through AMPK/PGC-1α signaling pathway, which not only enriches the nutritional and physiological functions of naringin, but also provides a theoretical basis for the regulation of muscle fiber type transformation by nutritional approaches.
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Affiliation(s)
- Yonghong Xue
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Zhiqing Huang
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Xiaoling Chen
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China.
| | - Gang Jia
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Hua Zhao
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Guangmang Liu
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
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11
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Xu M, Chen X, Huang Z, Chen D, Yu B, He J, Chen H, Yu J, Luo Y, Zheng P. Procyanidin B2 induces porcine skeletal slow-twitch myofiber gene expression by AMP-activated protein kinase signaling pathway. Anim Biotechnol 2021; 33:346-355. [PMID: 34061706 DOI: 10.1080/10495398.2021.1927065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
In this study, our aim is to investigate the effect of dimer procyanidin B2 [epicatechin-(4β-8)-epicatechin] (PB2) on porcine skeletal myofiber gene expression in vitro. Our data showed PB2 promoted the protein expression of slow myosin heavy chain (MyHC) in porcine myotubes, concomitant with the increases in mRNA levels of MyHC I, MyHC IIa and Tnni1. We also found PB2 activated AMPK signaling in porcine myotubes. NRF1 and CaMKKβ that are two important upstream factors of AMPK, and Sirt1 and PGC-1α that are two major downstream factors of AMPK, were also up-regulated by PB2. The mechanism study showed the effect of PB2 on slow-twitch myofiber gene expression was abolished by AMPK inhibitor compound C or by AMPKα1 siRNA. Together, we found PB2 induced porcine skeletal slow-twitch myofiber gene expression by AMPK signaling pathway.
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Affiliation(s)
- Meng Xu
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
| | - Xiaoling Chen
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
| | - Zhiqing Huang
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
| | - Daiwen Chen
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
| | - Bing Yu
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
| | - Jun He
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
| | - Hong Chen
- College of Food Science, Sichuan Agricultural University, Yaan, Sichuan, P. R. China
| | - Jie Yu
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
| | - Yuheng Luo
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
| | - Ping Zheng
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, P. R. China
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12
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Khodabukus A. Tissue-Engineered Skeletal Muscle Models to Study Muscle Function, Plasticity, and Disease. Front Physiol 2021; 12:619710. [PMID: 33716768 PMCID: PMC7952620 DOI: 10.3389/fphys.2021.619710] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 01/25/2021] [Indexed: 12/20/2022] Open
Abstract
Skeletal muscle possesses remarkable plasticity that permits functional adaptations to a wide range of signals such as motor input, exercise, and disease. Small animal models have been pivotal in elucidating the molecular mechanisms regulating skeletal muscle adaptation and plasticity. However, these small animal models fail to accurately model human muscle disease resulting in poor clinical success of therapies. Here, we review the potential of in vitro three-dimensional tissue-engineered skeletal muscle models to study muscle function, plasticity, and disease. First, we discuss the generation and function of in vitro skeletal muscle models. We then discuss the genetic, neural, and hormonal factors regulating skeletal muscle fiber-type in vivo and the ability of current in vitro models to study muscle fiber-type regulation. We also evaluate the potential of these systems to be utilized in a patient-specific manner to accurately model and gain novel insights into diseases such as Duchenne muscular dystrophy (DMD) and volumetric muscle loss. We conclude with a discussion on future developments required for tissue-engineered skeletal muscle models to become more mature, biomimetic, and widely utilized for studying muscle physiology, disease, and clinical use.
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Affiliation(s)
- Alastair Khodabukus
- Department of Biomedical Engineering, Duke University, Durham, NC, United States
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13
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Ahmadi A, Sheikholeslami-Vatani D, Ghaeeni S, Baazm M. The effects of different training modalities on monocarboxylate transporters MCT1 and MCT4, hypoxia inducible factor-1α (HIF-1α), and PGC-1α gene expression in rat skeletal muscles. Mol Biol Rep 2021; 48:2153-2161. [PMID: 33625690 DOI: 10.1007/s11033-021-06224-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 02/09/2021] [Indexed: 01/26/2023]
Abstract
The research literature suggests that different training modalities cause various patterns in training-induced genes expression. This study aimed to investigate the effects of moderate intensity continuous training (MICT) and isocaloric high intensity interval training (HIIT) on gene expression of monocarboxylate transporter 1 (MCT1) and 4 (MCT4), Peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α), and hypoxia inducible factor-1α (HIF-1α) in soleus and extensor digitorum longus (EDL) skeletal muscles of rats. Thirty male Sprague-Dawley rats were divided into 3 groups of control, MICT, and HIIT. Training protocols were performed according to the principle of overload for 8 weeks and 5 sessions per week. Then, the soleus and EDL muscles were extracted and the expression levels were analyzed using the real time PCR method. In the MICT group, only the EDL HIF-1α mRNA level was significantly higher than that of the control group (p < 0.05). In the HIIT group, however, mRNA levels of MCT4, PGC-1α, and HIF-1α in both muscles were significantly higher than those of the control group (p < 0.05). The comparison between the two training methods demonstrated that the gene expression levels of soleus and EDL MCT4, soleus PGC-1α, and soleus HIF-1α were significantly higher in the HIIT group compared to the MICT group (p < 0.05). There were also significant positive correlations between all mRNA levels of HIF-1α and corresponding mRNA levels of MCT4 (p < 0.05). HIIT caused greater positive responses in the gene expression of MCT4, PGC-1α, and HIF-1α compared to MICT.
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Affiliation(s)
- Akbar Ahmadi
- Department of Physical Education and Sport Sciences, University of Kurdistan, 66177-15175, Sanandaj, Iran
| | | | - Saeed Ghaeeni
- Department of Physical Education and Sport Sciences, University of Kurdistan, 66177-15175, Sanandaj, Iran
| | - Maryam Baazm
- Department of Anatomy, School of Medicine, Arak University of Medical Sciences, Arak, Iran
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14
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Xu M, Chen X, Huang Z, Chen D, Yu B, Chen H, Luo Y, Zheng P, Yu J, He J. Grape seed proanthocyanidin extract promotes skeletal muscle fiber type transformation via AMPK signaling pathway. J Nutr Biochem 2020; 84:108462. [DOI: 10.1016/j.jnutbio.2020.108462] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 05/23/2020] [Accepted: 06/28/2020] [Indexed: 12/24/2022]
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15
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Xu M, Chen X, Huang Z, Chen D, Chen H, Luo Y, Zheng P, He J, Yu J, Yu B. Procyanidin B2 Promotes Skeletal Slow-Twitch Myofiber Gene Expression through the AMPK Signaling Pathway in C2C12 Myotubes. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:1306-1314. [PMID: 31957433 DOI: 10.1021/acs.jafc.9b07489] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Dimer procyanidin B2 [epicatechin-(4β-8)-epicatechin] (PB2) has attracted a lot of interest in nutrition and medicine because of its significant health-promoting abilities. However, the function of PB2 on different types of skeletal myofiber is still unclear. Here, we have found that PB2 significantly increased protein expression of the slow myosin heavy chain (MyHC) and decreased fast MyHC protein in C2C12 myotubes, accompanied by upregulation of mRNA expression of MyHC I, MyHC IIa, and Tnni1 and downregulation of MyHC IIx and MyHC IIb. We have also found that PB2 enhanced the activities of malate dehydrogenase and succinic dehydrogenase and reduced lactate dehydrogenase activity. PB2 promoted phosphorylation of AMPK and significantly increased mRNA expression of AMPKα1. The upstream factors of AMPK, such as phospho-LKB1, NRF1, and CaMKKβ, and the downstream factors of AMPK, including Sirt1 and PGC-1α, were also increased by PB2. Specific suppression of AMPK signaling by AMPKα1 siRNA or by AMPK inhibitor compound C significantly attenuated the PB2-induced upregulation of phospho-AMPK, PGC-1α, and slow MyHC and downregulation of fast MyHC. Our findings suggested that PB2 promotes skeletal slow-twitch myofiber gene expression through the AMPK signaling pathway in C2C12 myotubes.
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Affiliation(s)
- Meng Xu
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition , Sichuan Agricultural University , Chengdu , Sichuan 611130 , P. R. China
| | - Xiaoling Chen
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition , Sichuan Agricultural University , Chengdu , Sichuan 611130 , P. R. China
| | - Zhiqing Huang
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition , Sichuan Agricultural University , Chengdu , Sichuan 611130 , P. R. China
| | - Daiwen Chen
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition , Sichuan Agricultural University , Chengdu , Sichuan 611130 , P. R. China
| | - Hong Chen
- College of Food Science , Sichuan Agricultural University , Yaan , Sichuan 625014 , P. R. China
| | - Yuheng Luo
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition , Sichuan Agricultural University , Chengdu , Sichuan 611130 , P. R. China
| | - Ping Zheng
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition , Sichuan Agricultural University , Chengdu , Sichuan 611130 , P. R. China
| | - Jun He
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition , Sichuan Agricultural University , Chengdu , Sichuan 611130 , P. R. China
| | - Jie Yu
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition , Sichuan Agricultural University , Chengdu , Sichuan 611130 , P. R. China
| | - Bing Yu
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition , Sichuan Agricultural University , Chengdu , Sichuan 611130 , P. R. China
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16
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Protein Arginine Methyltransferases in Cardiovascular and Neuronal Function. Mol Neurobiol 2019; 57:1716-1732. [PMID: 31823198 DOI: 10.1007/s12035-019-01850-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 12/01/2019] [Indexed: 12/16/2022]
Abstract
The methylation of arginine residues by protein arginine methyltransferases (PRMTs) is a type of post-translational modification which is important for numerous cellular processes, including mRNA splicing, DNA repair, signal transduction, protein interaction, and transport. PRMTs have been extensively associated with various pathologies, including cancer, inflammation, and immunity response. However, the role of PRMTs has not been well described in vascular and neurological function. Aberrant expression of PRMTs can alter its metabolic products, asymmetric dimethylarginine (ADMA), and symmetric dimethylarginine (SDMA). Increased ADMA levels are recognized as an independent risk factor for cardiovascular disease and mortality. Recent studies have provided considerable advances in the development of small-molecule inhibitors of PRMTs to study their function under normal and pathological states. In this review, we aim to elucidate the particular roles of PRMTs in vascular and neuronal function as a potential target for cardiovascular and neurological diseases.
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17
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Torma F, Gombos Z, Jokai M, Takeda M, Mimura T, Radak Z. High intensity interval training and molecular adaptive response of skeletal muscle. SPORTS MEDICINE AND HEALTH SCIENCE 2019; 1:24-32. [PMID: 35782463 PMCID: PMC9219277 DOI: 10.1016/j.smhs.2019.08.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Increased cardiovascular fitness, V˙O2max, is associated with enhanced endurance capacity and a decreased rate of mortality. High intensity interval training (HIIT) is one of the best methods to increase V˙O2max and endurance capacity for top athletes and for the general public as well. Because of the high intensity of this type of training, the adaptive response is not restricted to Type I fibers, as found for moderate intensity exercise of long duration. Even with a short exercise duration, HIIT can induce activation of AMPK, PGC-1α, SIRT1 and ROS pathway as well as by the modulation of Ca2+ homeostasis, leading to enhanced mitochondrial biogenesis, and angiogenesis. The present review summarizes the current knowledge of the adaptive response of HIIT.
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Affiliation(s)
- Ferenc Torma
- Research Center of Molecular Exercise Science, University of Physical Education, Budapest, Hungary
| | - Zoltan Gombos
- Research Center of Molecular Exercise Science, University of Physical Education, Budapest, Hungary
| | - Matyas Jokai
- Research Center of Molecular Exercise Science, University of Physical Education, Budapest, Hungary
| | - Masaki Takeda
- Faculty of Health and Sports Science, Doshisha University, Kyotanabe, Japan
| | - Tatsuya Mimura
- Faculty of Sport and Health Sciences, Osaka Sangyo University, Osaka, Japan
| | - Zsolt Radak
- Research Center of Molecular Exercise Science, University of Physical Education, Budapest, Hungary
- Corresponding author. Alkotas u. 44, Budapest, H-1123, Hungary.
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18
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Gill JF, Delezie J, Santos G, McGuirk S, Schnyder S, Frank S, Rausch M, St‐Pierre J, Handschin C. Peroxisome proliferator-activated receptor γ coactivator 1α regulates mitochondrial calcium homeostasis, sarcoplasmic reticulum stress, and cell death to mitigate skeletal muscle aging. Aging Cell 2019; 18:e12993. [PMID: 31290266 PMCID: PMC6718523 DOI: 10.1111/acel.12993] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 04/26/2019] [Accepted: 05/27/2019] [Indexed: 11/28/2022] Open
Abstract
Age-related impairment of muscle function severely affects the health of an increasing elderly population. While causality and the underlying mechanisms remain poorly understood, exercise is an efficient intervention to blunt these aging effects. We thus investigated the role of the peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α), a potent regulator of mitochondrial function and exercise adaptation, in skeletal muscle during aging. We demonstrate that PGC-1α overexpression improves mitochondrial dynamics and calcium buffering in an estrogen-related receptor α-dependent manner. Moreover, we show that sarcoplasmic reticulum stress is attenuated by PGC-1α. As a result, PGC-1α prevents tubular aggregate formation and cell death pathway activation in old muscle. Similarly, the pro-apoptotic effects of ceramide and thapsigargin were blunted by PGC-1α in muscle cells. Accordingly, mice with muscle-specific gain-of-function and loss-of-function of PGC-1α exhibit a delayed and premature aging phenotype, respectively. Together, our data reveal a key protective effect of PGC-1α on muscle function and overall health span in aging.
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Affiliation(s)
- Jonathan F. Gill
- Biozentrum, Division of Pharmacology/Neurobiology University of Basel Basel Switzerland
| | - Julien Delezie
- Biozentrum, Division of Pharmacology/Neurobiology University of Basel Basel Switzerland
| | - Gesa Santos
- Biozentrum, Division of Pharmacology/Neurobiology University of Basel Basel Switzerland
| | - Shawn McGuirk
- Department of Biochemistry, Rosalind and Morris Goodman Cancer Centre McGill University Montreal Quebec Canada
| | - Svenia Schnyder
- Biozentrum, Division of Pharmacology/Neurobiology University of Basel Basel Switzerland
| | - Stephan Frank
- Division of Neuropathology, Institute of Pathology, University Hospital Basel University of Basel Basel Switzerland
| | - Martin Rausch
- Biotherapeutic and Analytical Technologies Novartis Institutes for BioMedical Research (NIBR) Basel Switzerland
| | - Julie St‐Pierre
- Department of Biochemistry, Rosalind and Morris Goodman Cancer Centre McGill University Montreal Quebec Canada
| | - Christoph Handschin
- Biozentrum, Division of Pharmacology/Neurobiology University of Basel Basel Switzerland
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19
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Wang T, Xu YQ, Yuan YX, Xu PW, Zhang C, Li F, Wang LN, Yin C, Zhang L, Cai XC, Zhu CJ, Xu JR, Liang BQ, Schaul S, Xie PP, Yue D, Liao ZR, Yu LL, Luo L, Zhou G, Yang JP, He ZH, Du M, Zhou YP, Deng BC, Wang SB, Gao P, Zhu XT, Xi QY, Zhang YL, Shu G, Jiang QY. Succinate induces skeletal muscle fiber remodeling via SUNCR1 signaling. EMBO Rep 2019; 20:e47892. [PMID: 31318145 PMCID: PMC6727026 DOI: 10.15252/embr.201947892] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 06/13/2019] [Accepted: 06/26/2019] [Indexed: 01/08/2023] Open
Abstract
The conversion of skeletal muscle fiber from fast twitch to slow‐twitch is important for sustained and tonic contractile events, maintenance of energy homeostasis, and the alleviation of fatigue. Skeletal muscle remodeling is effectively induced by endurance or aerobic exercise, which also generates several tricarboxylic acid (TCA) cycle intermediates, including succinate. However, whether succinate regulates muscle fiber‐type transitions remains unclear. Here, we found that dietary succinate supplementation increased endurance exercise ability, myosin heavy chain I expression, aerobic enzyme activity, oxygen consumption, and mitochondrial biogenesis in mouse skeletal muscle. By contrast, succinate decreased lactate dehydrogenase activity, lactate production, and myosin heavy chain IIb expression. Further, by using pharmacological or genetic loss‐of‐function models generated by phospholipase Cβ antagonists, SUNCR1 global knockout, or SUNCR1 gastrocnemius‐specific knockdown, we found that the effects of succinate on skeletal muscle fiber‐type remodeling are mediated by SUNCR1 and its downstream calcium/NFAT signaling pathway. In summary, our results demonstrate succinate induces transition of skeletal muscle fiber via SUNCR1 signaling pathway. These findings suggest the potential beneficial use of succinate‐based compounds in both athletic and sedentary populations.
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Affiliation(s)
- Tao Wang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Ya-Qiong Xu
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Ye-Xian Yuan
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Ping-Wen Xu
- Division of Endocrinology, Department of Medicine, The University of Illinois at Chicago, Chicago, IL, USA
| | - Cha Zhang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Fan Li
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Li-Na Wang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Cong Yin
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Lin Zhang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Xing-Cai Cai
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Can-Jun Zhu
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Jing-Ren Xu
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Bing-Qing Liang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Sarah Schaul
- Division of Endocrinology, Department of Medicine, The University of Illinois at Chicago, Chicago, IL, USA
| | - Pei-Pei Xie
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Dong Yue
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Zheng-Rui Liao
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Lu-Lu Yu
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Lv Luo
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Gan Zhou
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Jin-Ping Yang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Zhi-Hui He
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Man Du
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Yu-Ping Zhou
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Bai-Chuan Deng
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Song-Bo Wang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Ping Gao
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Xiao-Tong Zhu
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Qian-Yun Xi
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Yong-Liang Zhang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Gang Shu
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China.,National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Qing-Yan Jiang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China.,National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
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20
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Andrich DE, Ou Y, Melbouci L, Leduc-Gaudet JP, Auclair N, Mercier J, Secco B, Tomaz LM, Gouspillou G, Danialou G, Comtois AS, St-Pierre DH. Altered Lipid Metabolism Impairs Skeletal Muscle Force in Young Rats Submitted to a Short-Term High-Fat Diet. Front Physiol 2018; 9:1327. [PMID: 30356919 PMCID: PMC6190893 DOI: 10.3389/fphys.2018.01327] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 09/03/2018] [Indexed: 12/15/2022] Open
Abstract
Obesity and ensuing disorders are increasingly prevalent in young populations. Prolonged exposure to high-fat diets (HFD) and excessive lipid accumulation were recently suggested to impair skeletal muscle functions in rodents. We aimed to determine the effects of a short-term HFD on skeletal muscle function in young rats. Young male Wistar rats (100–125 g) were fed HFD or a regular chow diet (RCD) for 14 days. Specific force, resistance to fatigue and recovery were tested in extensor digitorum longus (EDL; glycolytic) and soleus (SOL; oxidative) muscles using an ex vivo muscle contractility system. Muscle fiber typing and insulin signaling were analyzed while intramyocellular lipid droplets (LD) were characterized. Expression of key markers of lipid metabolism was also measured. Weight gain was similar for both groups. Specific force was decreased in SOL, but not in EDL of HFD rats. Muscle resistance to fatigue and force recovery were not altered in response to the diets. Similarly, muscle fiber type distribution and insulin signaling were not influenced by HFD. On the other hand, percent area and average size of intramyocellular LDs were significantly increased in the SOL of HFD rats. These effects were consistent with the increased expression of several mediators of lipid metabolism in the SOL muscle. A short-term HFD impairs specific force and alters lipid metabolism in SOL, but not EDL muscles of young rats. This indicates the importance of clarifying the early mechanisms through which lipid metabolism affects skeletal muscle functions in response to obesogenic diets in young populations.
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Affiliation(s)
- David E Andrich
- Département des Sciences de l'Activités Physique, Université du Québec à Montréal, Montreal, QC, Canada.,Groupe de Recherche en Activité Physique Adaptée, Université du Québec à Montréal, Montreal, QC, Canada.,Département des Sciences Biologiques, Université du Québec à Montréal, Montreal, QC, Canada
| | - Ya Ou
- Département des Sciences de l'Activités Physique, Université du Québec à Montréal, Montreal, QC, Canada.,Groupe de Recherche en Activité Physique Adaptée, Université du Québec à Montréal, Montreal, QC, Canada.,Centre de Recherche du CHU Sainte-Justine, Montreal, QC, Canada
| | - Lilya Melbouci
- Département des Sciences de l'Activités Physique, Université du Québec à Montréal, Montreal, QC, Canada.,Groupe de Recherche en Activité Physique Adaptée, Université du Québec à Montréal, Montreal, QC, Canada.,Centre de Recherche du CHU Sainte-Justine, Montreal, QC, Canada
| | - Jean-Philippe Leduc-Gaudet
- Département des Sciences de l'Activités Physique, Université du Québec à Montréal, Montreal, QC, Canada.,Groupe de Recherche en Activité Physique Adaptée, Université du Québec à Montréal, Montreal, QC, Canada
| | - Nickolas Auclair
- Département des Sciences de l'Activités Physique, Université du Québec à Montréal, Montreal, QC, Canada.,Groupe de Recherche en Activité Physique Adaptée, Université du Québec à Montréal, Montreal, QC, Canada.,Centre de Recherche du CHU Sainte-Justine, Montreal, QC, Canada
| | - Jocelyne Mercier
- Département des Sciences de l'Activités Physique, Université du Québec à Montréal, Montreal, QC, Canada.,Groupe de Recherche en Activité Physique Adaptée, Université du Québec à Montréal, Montreal, QC, Canada.,Centre de Recherche du CHU Sainte-Justine, Montreal, QC, Canada
| | - Blandine Secco
- Centre de Recherche de l'Institut de Cardiologie et de Pneumologie de Québec, Ville de Québec, QC, Canada
| | - Luciane Magri Tomaz
- Département des Sciences de l'Activités Physique, Université du Québec à Montréal, Montreal, QC, Canada.,Groupe de Recherche en Activité Physique Adaptée, Université du Québec à Montréal, Montreal, QC, Canada.,Centre de Recherche du CHU Sainte-Justine, Montreal, QC, Canada
| | - Gilles Gouspillou
- Département des Sciences de l'Activités Physique, Université du Québec à Montréal, Montreal, QC, Canada.,Groupe de Recherche en Activité Physique Adaptée, Université du Québec à Montréal, Montreal, QC, Canada
| | - Gawiyou Danialou
- Département des Sciences de l'Activités Physique, Université du Québec à Montréal, Montreal, QC, Canada.,Royal Military College Saint-Jean, Saint-Jean-sur-Richelieu, QC, Canada
| | - Alain-Steve Comtois
- Département des Sciences de l'Activités Physique, Université du Québec à Montréal, Montreal, QC, Canada.,Groupe de Recherche en Activité Physique Adaptée, Université du Québec à Montréal, Montreal, QC, Canada
| | - David H St-Pierre
- Département des Sciences de l'Activités Physique, Université du Québec à Montréal, Montreal, QC, Canada.,Groupe de Recherche en Activité Physique Adaptée, Université du Québec à Montréal, Montreal, QC, Canada.,Centre de Recherche du CHU Sainte-Justine, Montreal, QC, Canada
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21
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Whitehead N, Gill JF, Brink M, Handschin C. Moderate Modulation of Cardiac PGC-1α Expression Partially Affects Age-Associated Transcriptional Remodeling of the Heart. Front Physiol 2018; 9:242. [PMID: 29618980 PMCID: PMC5871735 DOI: 10.3389/fphys.2018.00242] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 03/06/2018] [Indexed: 01/09/2023] Open
Abstract
Aging is associated with a decline in cardiac function due to a decreased myocardial reserve. This adverse cardiac remodeling comprises of a variety of changes, including a reduction in mitochondrial function and a decline in the expression of the peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α), a central regulator of mitochondrial biogenesis and metabolic adaptation in the myocardium. To study the etiological involvement of PGC-1α in cardiac aging, we used mouse models mimicking the modest down- and upregulation of this coactivator in the old and the exercised heart, respectively. Young mice with reduced cardiac expression of PGC-1α recapitulated part of the age-related impairment in mitochondrial gene expression, but otherwise did not aggravate the aging process. Inversely however, moderate overexpression of PGC-1α counteracts numerous key age-related remodeling changes, e.g., by improving blood pressure, age-associated apoptosis, and collagen accumulation, as well as in the expression of many, but not all cardiac genes involved in mitochondrial biogenesis, dynamics, metabolism, calcium handling and contractility. Thus, while the reduction of PGC-1α in the heart is insufficient to cause an aging phenotype, moderate overexpression reduces pathological remodeling of older hearts and could thereby contribute to the beneficial effects of exercise on cardiac function in aging.
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Affiliation(s)
| | | | - Marijke Brink
- Department of Biomedicine, University of Basel and University Hospital Basel, Basel, Switzerland
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22
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Gill JF, Santos G, Schnyder S, Handschin C. PGC-1α affects aging-related changes in muscle and motor function by modulating specific exercise-mediated changes in old mice. Aging Cell 2018; 17. [PMID: 29067788 PMCID: PMC5770876 DOI: 10.1111/acel.12697] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/23/2017] [Indexed: 02/06/2023] Open
Abstract
The age-related impairment in muscle function results in a drastic decline in motor coordination and mobility in elderly individuals. Regular physical activity is the only efficient intervention to prevent and treat this age-associated degeneration. However, the mechanisms that underlie the therapeutic effect of exercise in this context remain unclear. We assessed whether endurance exercise training in old age is sufficient to affect muscle and motor function. Moreover, as muscle peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α) is a key regulatory hub in endurance exercise adaptation with decreased expression in old muscle, we studied the involvement of PGC-1α in the therapeutic effect of exercise in aging. Intriguingly, PGC-1α muscle-specific knockout and overexpression, respectively, precipitated and alleviated specific aspects of aging-related deterioration of muscle function in old mice, while other muscle dysfunctions remained unchanged upon PGC-1α modulation. Surprisingly, we discovered that muscle PGC-1α was not only involved in improving muscle endurance and mitochondrial remodeling, but also phenocopied endurance exercise training in advanced age by contributing to maintaining balance and motor coordination in old animals. Our data therefore suggest that the benefits of exercise, even when performed at old age, extend beyond skeletal muscle and are at least in part mediated by PGC-1α.
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Affiliation(s)
| | - Gesa Santos
- Biozentrum; University of Basel; Basel Switzerland
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23
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Pambianco S, Giovarelli M, Perrotta C, Zecchini S, Cervia D, Di Renzo I, Moscheni C, Ripolone M, Violano R, Moggio M, Bassi MT, Puri PL, Latella L, Clementi E, De Palma C. Reversal of Defective Mitochondrial Biogenesis in Limb-Girdle Muscular Dystrophy 2D by Independent Modulation of Histone and PGC-1α Acetylation. Cell Rep 2017; 17:3010-3023. [PMID: 27974213 DOI: 10.1016/j.celrep.2016.11.044] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 06/10/2016] [Accepted: 11/11/2016] [Indexed: 01/05/2023] Open
Abstract
Mitochondrial dysfunction occurs in many muscle degenerative disorders. Here, we demonstrate that mitochondrial biogenesis was impaired in limb-girdle muscular dystrophy (LGMD) 2D patients and mice and was associated with impaired OxPhos capacity. Two distinct approaches that modulated histones or peroxisome proliferator-activated receptor-gamma coactivator 1 α (PGC-1α) acetylation exerted equivalent functional effects by targeting different mitochondrial pathways (mitochondrial biogenesis or fatty acid oxidation[FAO]). The histone deacetylase inhibitor Trichostatin A (TSA) changed chromatin assembly at the PGC-1α promoter, restored mitochondrial biogenesis, and enhanced muscle oxidative capacity. Conversely, nitric oxide (NO) triggered post translation modifications of PGC-1α and induced FAO, recovering the bioenergetics impairment of muscles but shunting the defective mitochondrial biogenesis. In conclusion, a transcriptional blockade of mitochondrial biogenesis occurred in LGMD-2D and could be recovered by TSA changing chromatin conformation, or it could be overcome by NO activating a mitochondrial salvage pathway.
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Affiliation(s)
- Sarah Pambianco
- Department of Biomedical and Clinical Sciences "Luigi Sacco," Università degli Studi di Milano, 20157 Milano, Italy
| | - Matteo Giovarelli
- Department of Biomedical and Clinical Sciences "Luigi Sacco," Università degli Studi di Milano, 20157 Milano, Italy
| | - Cristiana Perrotta
- Department of Biomedical and Clinical Sciences "Luigi Sacco," Università degli Studi di Milano, 20157 Milano, Italy
| | - Silvia Zecchini
- Department of Biomedical and Clinical Sciences, Unit of Clinical Pharmacology, University Hospital "Luigi Sacco"-ASST Fatebenefratelli Sacco, National Research Council-Institute of Neuroscience, Università degli Studi di Milano, 20157 Milano, Italy
| | - Davide Cervia
- Department of Biomedical and Clinical Sciences "Luigi Sacco," Università degli Studi di Milano, 20157 Milano, Italy; Department for Innovation in Biological, Agro-food and Forest systems, Università degli Studi della Tuscia, 01100 Viterbo, Italy
| | - Ilaria Di Renzo
- Department of Biomedical and Clinical Sciences "Luigi Sacco," Università degli Studi di Milano, 20157 Milano, Italy
| | - Claudia Moscheni
- Department of Biomedical and Clinical Sciences "Luigi Sacco," Università degli Studi di Milano, 20157 Milano, Italy
| | - Michela Ripolone
- Neuromuscular Unit, Dino Ferrari Centre, IRCCS Foundation Ca' Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, 20122 Milano, Italy
| | - Raffaella Violano
- Neuromuscular Unit, Dino Ferrari Centre, IRCCS Foundation Ca' Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, 20122 Milano, Italy
| | - Maurizio Moggio
- Neuromuscular Unit, Dino Ferrari Centre, IRCCS Foundation Ca' Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, 20122 Milano, Italy
| | | | - Pier Lorenzo Puri
- Epigenetics and Regenerative Pharmacology, IRCCS Fondazione Santa Lucia, 00142 Roma, Italy; Sanford Children's Health Research Center, Sanford Prebys Burnham Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Lucia Latella
- Epigenetics and Regenerative Pharmacology, IRCCS Fondazione Santa Lucia, 00142 Roma, Italy; National Research Council-Institute of Translational Pharmacology, 00179 Roma, Italy
| | - Emilio Clementi
- Department of Biomedical and Clinical Sciences, Unit of Clinical Pharmacology, University Hospital "Luigi Sacco"-ASST Fatebenefratelli Sacco, National Research Council-Institute of Neuroscience, Università degli Studi di Milano, 20157 Milano, Italy; IRCCS Eugenio Medea, 23842 Bosisio Parini, Italy.
| | - Clara De Palma
- Department of Biomedical and Clinical Sciences, Unit of Clinical Pharmacology, University Hospital "Luigi Sacco"-ASST Fatebenefratelli Sacco, National Research Council-Institute of Neuroscience, Università degli Studi di Milano, 20157 Milano, Italy.
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24
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Mutikainen M, Tuomainen T, Naumenko N, Huusko J, Smirin B, Laidinen S, Kokki K, Hynynen H, Ylä-Herttuala S, Heinäniemi M, Ruas JL, Tavi P. Peroxisome proliferator-activated receptor-γ coactivator 1 α1 induces a cardiac excitation-contraction coupling phenotype without metabolic remodelling. J Physiol 2017; 594:7049-7071. [PMID: 27716916 DOI: 10.1113/jp272847] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 09/21/2016] [Indexed: 02/06/2023] Open
Abstract
KEY POINTS Transcriptional co-activator PGC-1α1 has been shown to regulate energy metabolism and to mediate metabolic adaptations in pathological and physiological cardiac hypertrophy but other functional implications of PGC-1α1 expression are not known. Transgenic PGC-1α1 overexpression within the physiological range in mouse heart induces purposive changes in contractile properties, electrophysiology and calcium signalling but does not induce substantial metabolic remodelling. The phenotype of the PGC-1α1 transgenic mouse heart recapitulates most of the functional modifications usually associated with the exercise-induced heart phenotype, but does not protect the heart against load-induced pathological hypertrophy. Transcriptional effects of PGC-1α1 show clear dose-dependence with diverse changes in genes in circadian clock, heat shock, excitability, calcium signalling and contraction pathways at low overexpression levels, while metabolic genes are recruited at much higher PGC-1α1 expression levels. These results imply that the physiological role of PGC-1α1 is to promote a beneficial excitation-contraction coupling phenotype in the heart. ABSTRACT The transcriptional coactivator PGC-1α1 has been identified as a central factor mediating metabolic adaptations of the heart. However, to what extent physiological changes in PGC-1α1 expression levels actually contribute to the functional adaptation of the heart is still mostly unresolved. The aim of this study was to characterize the transcriptional and functional effects of physiologically relevant, moderate PGC-1α1 expression in the heart. In vivo and ex vivo physiological analysis shows that expression of PGC-1α1 within a physiological range in mouse heart does not induce the expected metabolic alterations, but instead induces a unique excitation-contraction (EC) coupling phenotype recapitulating features typically seen in physiological hypertrophy. Transcriptional screening of PGC-1α1 overexpressing mouse heart and myocyte cultures with higher, acute adenovirus-induced PGC-1α1 expression, highlights PGC-1α1 as a transcriptional coactivator with a number of binding partners in various pathways (such as heat shock factors and the circadian clock) through which it acts as a pleiotropic transcriptional regulator in the heart, to both augment and repress the expression of its target genes in a dose-dependent fashion. At low levels of overexpression PGC-1α1 elicits a diverse transcriptional response altering the expression state of circadian clock, heat shock, excitability, calcium signalling and contraction pathways, while metabolic targets of PGC-1α1 are recruited at higher PGC-1α1 expression levels. Together these findings demonstrate that PGC-1α1 elicits a dual effect on cardiac transcription and phenotype. Further, our results imply that the physiological role of PGC-1α1 is to promote a beneficial EC coupling phenotype in the heart.
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Affiliation(s)
- Maija Mutikainen
- Department of Biotechnology and Molecular Medicine, A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Tomi Tuomainen
- Department of Biotechnology and Molecular Medicine, A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Nikolay Naumenko
- Department of Biotechnology and Molecular Medicine, A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Jenni Huusko
- Department of Biotechnology and Molecular Medicine, A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Boris Smirin
- Department of Biotechnology and Molecular Medicine, A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland.,Institute of General Pathology and Pathophysiology, Moscow, Russia
| | - Svetlana Laidinen
- Department of Biotechnology and Molecular Medicine, A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Krista Kokki
- Institute of Biomedicine, School of Medicine, University of Eastern Finland, Kuopio, Finland
| | - Heidi Hynynen
- Department of Biotechnology and Molecular Medicine, A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Seppo Ylä-Herttuala
- Department of Biotechnology and Molecular Medicine, A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Merja Heinäniemi
- Institute of Biomedicine, School of Medicine, University of Eastern Finland, Kuopio, Finland
| | - Jorge L Ruas
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Pasi Tavi
- Department of Biotechnology and Molecular Medicine, A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
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Jingting S, Qin X, Yanju S, Ming Z, Yunjie T, Gaige J, Zhongwei S, Jianmin Z. Oxidative and glycolytic skeletal muscles show marked differences in gene expression profile in Chinese Qingyuan partridge chickens. PLoS One 2017; 12:e0183118. [PMID: 28813489 PMCID: PMC5558948 DOI: 10.1371/journal.pone.0183118] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 07/28/2017] [Indexed: 12/17/2022] Open
Abstract
Oxidative and glycolytic myofibers have different structures and metabolic characteristics and their ratios are important in determining poultry meat quality. However, the molecular mechanisms underlying their differences are unclear. In this study, global gene expression profiling was conducted in oxidative skeletal muscle (obtained from the soleus, or SOL) and glycolytic skeletal muscle (obtained from the extensor digitorum longus, or EDL) of Chinese Qingyuan partridge chickens, using the Agilent Chicken Gene Expression Chip. A total of 1224 genes with at least 2-fold differences were identified (P < 0.05), of which 654 were upregulated and 570 were downregulated in SOL. GO, KEGG pathway, and co-expressed gene network analyses suggested that PRKAG3, ATP2A2, and PPARGC1A might play important roles in myofiber composition. The function of PPARGC1A gene was further validated. PPARGC1A mRNA expression levels were higher in SOL than in EDL muscles throughout the early postnatal development stages. In myoblast cells, shRNA knockdown of PPARGC1A significantly inhibited some muscle development and transition-related genes, including PPP3CA, MEF2C, and SM (P < 0.01 or P < 0.05), and significantly upregulated the expression of FWM (P < 0.05). Our study demonstrates strong transcriptome differences between oxidative and glycolytic myofibers, and the results suggest that PPARGC1A is a key gene involved in chicken myofiber composition and transition.
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Affiliation(s)
- Shu Jingting
- Key laboratory for poultry genetics and breeding of Jiangsu province, Institute of Poultry Science, Chinese Academy of Agricultural Science, Yangzhou, Jiangsu, China
| | - Xiao Qin
- Key laboratory for poultry genetics and breeding of Jiangsu province, Institute of Poultry Science, Chinese Academy of Agricultural Science, Yangzhou, Jiangsu, China
| | - Shan Yanju
- Key laboratory for poultry genetics and breeding of Jiangsu province, Institute of Poultry Science, Chinese Academy of Agricultural Science, Yangzhou, Jiangsu, China
| | - Zhang Ming
- Key laboratory for poultry genetics and breeding of Jiangsu province, Institute of Poultry Science, Chinese Academy of Agricultural Science, Yangzhou, Jiangsu, China
| | - Tu Yunjie
- Key laboratory for poultry genetics and breeding of Jiangsu province, Institute of Poultry Science, Chinese Academy of Agricultural Science, Yangzhou, Jiangsu, China
| | - Ji Gaige
- Key laboratory for poultry genetics and breeding of Jiangsu province, Institute of Poultry Science, Chinese Academy of Agricultural Science, Yangzhou, Jiangsu, China
| | - Sheng Zhongwei
- Key laboratory for poultry genetics and breeding of Jiangsu province, Institute of Poultry Science, Chinese Academy of Agricultural Science, Yangzhou, Jiangsu, China
| | - Zou Jianmin
- Key laboratory for poultry genetics and breeding of Jiangsu province, Institute of Poultry Science, Chinese Academy of Agricultural Science, Yangzhou, Jiangsu, China
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26
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Intravenous infusion of H2-saline suppresses oxidative stress and elevates antioxidant potential in Thoroughbred horses after racing exercise. Sci Rep 2015; 5:15514. [PMID: 26493164 PMCID: PMC4616033 DOI: 10.1038/srep15514] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 09/23/2015] [Indexed: 12/25/2022] Open
Abstract
Upon intensive, exhaustive exercise, exercise-induced reactive oxygen species may exceed the antioxidant defence threshold, consequently resulting in muscular damage or late-onset chronic inflammation. Recently, the therapeutic antioxidant and anti-inflammatory effects of molecular hydrogen (H2) for human rheumatoid arthritis have been demonstrated. However, it is also important to clarify the effects of administrating H2 in large animals other than humans, as H2 is thought to reach the target organ by passive diffusion upon delivery from the blood flow, indicating that the distance from the administration point to the target is critical. However, data on the effects of H2 on oxidative stress in real-life exhaustive exercise in large animals are currently lacking. We here investigated 13 Thoroughbred horses administered intravenous 2-L saline with or without 0.6-ppm H2 (placebo, N = 6; H2, N = 7) before participating in a high-intensity simulation race. Intravenous H2-saline significantly suppressed oxidative stress immediately, 3 h, and 24 h after the race, although the antioxidant capability was not affected throughout the study. The serum creatine kinase, lactate, and uric acid levels were increased in both groups. Taken together, these results indicate that intravenous H2-saline can significantly and specifically suppress oxidative stress induced after exhaustive racing in Thoroughbred horses.
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27
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Defects in cytochrome c oxidase expression induce a metabolic shift to glycolysis and carcinogenesis. GENOMICS DATA 2015; 6:99-107. [PMID: 26697345 PMCID: PMC4664720 DOI: 10.1016/j.gdata.2015.07.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 07/19/2015] [Accepted: 07/26/2015] [Indexed: 11/23/2022]
Abstract
Mitochondrial metabolic dysfunction is often seen in cancers. This paper shows that the defect in a mitochondrial electron transport component, the cytochrome c oxidase (CcO), leads to increased glycolysis and carcinogenesis. Using whole genome microarray expression analysis we show that genetic silencing of the CcO subunit Cox4i1 in mouse C2C12 myoblasts resulted in metabolic shift to glycolysis, activated a retrograde stress signaling, and induced carcinogenesis. In the knockdown cells, the expression of Cox4i1 was less than 5% of the control and the expression of the irreversible glycolytic enzymes (Hk1, Pfkm and Pkm) increased two folds, facilitating metabolic shift to glycolysis. The expression of Ca (2+) sensitive Calcineurin (Ppp3ca) and the expression of PI3-kinase (Pik3r4 and Pik3cb) increased by two folds. This Ca (2+)/Calcineurin/PI3K retrograde stress signaling induced the up-regulation of many nuclear genes involved in tumor progression. Overall, we found 1047 genes with 2-folds expression change (with p-value less than 0.01) between the knockdown and the control, among which were 35 up-regulated genes in pathways in cancer (enrichment p-value less than 10(- 5)). Functional analysis revealed that the up-regulated genes in pathways in cancer were dominated by genes in signal transduction, regulation of transcription and PI3K signaling pathway. These results suggest that a defect in CcO complex initiates a retrograde signaling which can induce tumor progression. Physiological studies of these cells and esophageal tumors from human patients support these results. GEO accession number = GSE68525.
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28
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Hood DA, Tryon LD, Vainshtein A, Memme J, Chen C, Pauly M, Crilly MJ, Carter H. Exercise and the Regulation of Mitochondrial Turnover. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2015; 135:99-127. [PMID: 26477912 DOI: 10.1016/bs.pmbts.2015.07.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Exercise is a well-known stimulus for the expansion of the mitochondrial pool within skeletal muscle. Mitochondria have a remarkable ability to remodel their networks and can respond to an array of signaling stimuli following contractile activity to adapt to the metabolic demands of the tissue, synthesizing proteins to expand the mitochondrial reticulum. In addition, when they become dysfunctional, these organelles can be recycled by a specialized intracellular system. The signals regulating this mitochondrial life cycle of synthesis and degradation during exercise are still an area of great research interest. As mitochondrial turnover has valuable consequences in physical performance, in addition to metabolic health, disease, and aging, consideration of the signals which control this cycle is vital. This review focuses on the regulation of mitochondrial turnover in skeletal muscle and summarizes our current understanding of the impact that exercise has in modulating this process.
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Affiliation(s)
- David A Hood
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada.
| | - Liam D Tryon
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
| | - Anna Vainshtein
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
| | - Jonathan Memme
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
| | - Chris Chen
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
| | - Marion Pauly
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
| | - Matthew J Crilly
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
| | - Heather Carter
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario, Canada
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29
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Khodabukus A, Baar K. Contractile and metabolic properties of engineered skeletal muscle derived from slow and fast phenotype mouse muscle. J Cell Physiol 2015; 230:1750-7. [PMID: 25335966 DOI: 10.1002/jcp.24848] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Accepted: 10/14/2014] [Indexed: 11/08/2022]
Abstract
Satellite cells derived from fast and slow muscles have been shown to adopt contractile and metabolic properties of their parent muscle. Mouse muscle shows less distinctive fiber-type profiles than rat or rabbit muscle. Therefore, in this study we sought to determine whether three-dimensional muscle constructs engineered from slow soleus (SOL) and fast tibialis anterior (TA) from mice would adopt the contractile and metabolic properties of their parent muscle. Time-to-peak tension (TPT) and half-relaxation time (1/2RT) was significantly slower in SOL constructs. In agreement with TPT, TA constructs contained significantly higher levels of fast myosin heavy chain (MHC) and fast troponin C, I, and T isoforms. Fast SERCA protein, both slow and fast calsequestrin isoforms and parvalbumin were found at higher levels in TA constructs. SOL constructs were more fatigue resistant and contained higher levels of the mitochondrial proteins SDH and ATP synthase and the fatty acid transporter CPT-1. SOL constructs contained lower levels of the glycolytic enzyme phosphofructokinase but higher levels of the β-oxidation enzymes LCAD and VLCAD suggesting greater fat oxidation. Despite no changes in PGC-1α protein, SOL constructs contained higher levels of SIRT1 and PRC. TA constructs contained higher levels of the slow-fiber program repressor SOX6 and the six transcriptional complex (STC) proteins Eya1 and Six4 which may underlie the higher in fast-fiber and lower slow-fiber program proteins. Overall, we have found that muscles engineered from predominantly slow and fast mouse muscle retain contractile and metabolic properties of their native muscle.
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Affiliation(s)
- Alastair Khodabukus
- Department of Neurobiology, Physiology and Behavior, University of California Davis, Davis, California
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30
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Khodabukus A, Baar K. The effect of serum origin on tissue engineered skeletal muscle function. J Cell Biochem 2015; 115:2198-207. [PMID: 25146978 DOI: 10.1002/jcb.24938] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 08/15/2014] [Indexed: 02/02/2023]
Abstract
Skeletal muscle phenotype is regulated by a complex interaction between genetic, hormonal, and electrical inputs. However, because of the interrelatedness of these factors in vivo it is difficult to determine the importance of one over the other. Over the last 5 years, we have engineered skeletal muscles in the European Union (EU) and the United States (US) using the same clone of C2C12 cells. Strikingly, the dynamics of contraction of the muscles was dramatically different. Therefore, in this study we sought to determine whether the hormonal milieu (source of fetal bovine serum (FBS)) could alter engineered muscle phenotype. In muscles engineered in serum of US origin time-to-peak tension (2.2-fold), half relaxation (2.6-fold), and fatigue resistance (improved 25%) all showed indications of a shift towards a slower phenotype. Even though there was a dramatic shift in the rate of contraction, myosin heavy chain expression was the same. The contraction speed was instead related to a shift in calcium release/sensitivity proteins (DHPR = 3.1-fold lower, slow CSQ = 3.4-fold higher, and slow TnT = 2.4-fold higher) and calcium uptake proteins (slow SERCA = 1.7-fold higher and parvalbumin = 41-fold lower). These shifts in calcium dynamics were accompanied by a partial shift in metabolic enzymes, but could not be explained by purported regulators of muscle phenotype. These data suggest that hormonal differences in serum of USDA and EU origin cause a shift in calcium handling resulting in a dramatic change in engineered muscle function.
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Affiliation(s)
- Alastair Khodabukus
- Department of Neurobiology, Physiology and Behavior, University of California Davis, Davis, CA, 95616, USA
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31
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Correia JC, Ferreira DMS, Ruas JL. Intercellular: local and systemic actions of skeletal muscle PGC-1s. Trends Endocrinol Metab 2015; 26:305-14. [PMID: 25934582 DOI: 10.1016/j.tem.2015.03.010] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 03/29/2015] [Accepted: 03/31/2015] [Indexed: 12/16/2022]
Abstract
Physical exercise promotes complex adaptations in skeletal muscle that benefit various aspects of human health. Many of these adaptations are coordinated at the gene expression level by the concerted action of transcriptional regulators. Peroxisome proliferator-activated receptor gamma (PPARγ) coactivator-1 (PGC-1) proteins play a prominent role in skeletal muscle transcriptional reprogramming induced by numerous stimuli. PGC-1s are master coactivators that orchestrate broad gene programs to modulate fuel supply and mitochondrial function, thus improving cellular energy metabolism. Recent studies unveiled novel biological functions for PGC-1s that extend well beyond skeletal muscle bioenergetics. Here we review recent advances in our understanding of PGC-1 actions in skeletal muscle, with special focus on their systemic effects.
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Affiliation(s)
- Jorge C Correia
- Molecular and Cellular Exercise Physiology, Department of Physiology and Pharmacology, Karolinska Institutet, SE-17177 Stockholm, Sweden
| | - Duarte M S Ferreira
- Molecular and Cellular Exercise Physiology, Department of Physiology and Pharmacology, Karolinska Institutet, SE-17177 Stockholm, Sweden
| | - Jorge L Ruas
- Molecular and Cellular Exercise Physiology, Department of Physiology and Pharmacology, Karolinska Institutet, SE-17177 Stockholm, Sweden.
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32
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Kob R, Bollheimer LC, Bertsch T, Fellner C, Djukic M, Sieber CC, Fischer BE. Sarcopenic obesity: molecular clues to a better understanding of its pathogenesis? Biogerontology 2014; 16:15-29. [PMID: 25376109 DOI: 10.1007/s10522-014-9539-7] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 11/03/2014] [Indexed: 12/20/2022]
Abstract
An age-dependent decline in skeletal muscle mass, strength, and endurance during the aging process is a physiological development, but several factors may exacerbate this process, leading to the threatening state of sarcopenia, frailty, and eventually higher mortality rates. Obesity appears to be such a promoting factor and has been linked in several studies to sarcopenia. The reason for this causal association remains poorly understood. Notwithstanding the fact that a higher body mass might simply lead to diminished physical activity and therefore contribute to a decline in skeletal muscle, several molecular mechanisms have been hypothesized. There could be an obesity derived intracellular lipotoxicity (i.e., elevated intramuscular levels of lipids and their derivatives), which induces apoptosis by means of an elevated oxidative stress. Paracrine mechanisms and inflammatory cytokines, such as CRP and IL-6 could be confounders of the actual underlying pathological mechanism. Due to a cross-talk of the hypothalamo-pituitary axis with nutritional status, obese subjects are more in a catabolic state of metabolism, with a higher susceptibility to muscle wasting under energy restriction. Obesity induces insulin resistance in the skeletal muscle, which consequently leads to perturbed metabolism, and misrouted signaling in the muscle cells. In obesity, muscle progenitor cells could differentiate to an adipocyte-like phenotype as a result of paracrine signals from (adipo)cytokines leading to a reduced muscular renewal capacity. The present review outlines current knowledge concerning possible pathways, which might be involved in the molecular pathogenesis of sarcopenic obesity.
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Affiliation(s)
- Robert Kob
- Institute for Biomedicine of Aging, Friedrich-Alexander-Universität Erlangen-Nürnberg, Kobergerstraße 60, 90408, Nuremberg, Germany
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33
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Pérez-Schindler J, Svensson K, Vargas-Fernández E, Santos G, Wahli W, Handschin C. The coactivator PGC-1α regulates skeletal muscle oxidative metabolism independently of the nuclear receptor PPARβ/δ in sedentary mice fed a regular chow diet. Diabetologia 2014; 57:2405-12. [PMID: 25116175 PMCID: PMC4657154 DOI: 10.1007/s00125-014-3352-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Accepted: 07/22/2014] [Indexed: 01/22/2023]
Abstract
AIMS/HYPOTHESIS Physical activity improves oxidative capacity and exerts therapeutic beneficial effects, particularly in the context of metabolic diseases. The peroxisome proliferator-activated receptor (PPAR) γ coactivator-1α (PGC-1α) and the nuclear receptor PPARβ/δ have both been independently discovered to play a pivotal role in the regulation of oxidative metabolism in skeletal muscle, though their interdependence remains unclear. Hence, our aim was to determine the functional interaction between these two factors in mouse skeletal muscle in vivo. METHODS Adult male control mice, PGC-1α muscle-specific transgenic (mTg) mice, PPARβ/δ muscle-specific knockout (mKO) mice and the combination PPARβ/δ mKO + PGC-1α mTg mice were studied under basal conditions and following PPARβ/δ agonist administration and acute exercise. Whole-body metabolism was assessed by indirect calorimetry and blood analysis, while magnetic resonance was used to measure body composition. Quantitative PCR and western blot were used to determine gene expression and intracellular signalling. The proportion of oxidative muscle fibre was determined by NADH staining. RESULTS Agonist-induced PPARβ/δ activation was only disrupted by PPARβ/δ knockout. We also found that the disruption of the PGC-1α-PPARβ/δ axis did not affect whole-body metabolism under basal conditions. As expected, PGC-1α mTg mice exhibited higher exercise performance, peak oxygen consumption and lower blood lactate levels following exercise, though PPARβ/δ mKO + PGC-1α mTg mice showed a similar phenotype. Similarly, we found that PPARβ/δ was dispensable for PGC-1α-mediated enhancement of an oxidative phenotype in skeletal muscle. CONCLUSIONS/INTERPRETATION Collectively, these results indicate that PPARβ/δ is not an essential partner of PGC-1α in the control of skeletal muscle energy metabolism.
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Affiliation(s)
| | - Kristoffer Svensson
- Biozentrum, University of Basel, Klingelbergstrasse 50/70, 4056 Basel, Switzerland
| | | | - Gesa Santos
- Biozentrum, University of Basel, Klingelbergstrasse 50/70, 4056 Basel, Switzerland
| | - Walter Wahli
- Center for Integrative Genomics, National Research Center Frontiers in Genetics, University of Lausanne, Le Génopode, 1015 Lausanne, Switzerland
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 169612
| | - Christoph Handschin
- Biozentrum, University of Basel, Klingelbergstrasse 50/70, 4056 Basel, Switzerland
- Corresponding author: Christoph Handschin, Biozentrum, University of Basel, Klingelbergstrasse 50/70, 4056 Basel, Switzerland. Phone: +41 61 267 2378,
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Gamu D, Bombardier E, Smith IC, Fajardo VA, Tupling AR. Sarcolipin Provides a Novel Muscle-Based Mechanism for Adaptive Thermogenesis. Exerc Sport Sci Rev 2014; 42:136-42. [DOI: 10.1249/jes.0000000000000016] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Arnold AS, Gill J, Christe M, Ruiz R, McGuirk S, St-Pierre J, Tabares L, Handschin C. Morphological and functional remodelling of the neuromuscular junction by skeletal muscle PGC-1α. Nat Commun 2014; 5:3569. [PMID: 24686533 PMCID: PMC4846352 DOI: 10.1038/ncomms4569] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Accepted: 03/06/2014] [Indexed: 11/09/2022] Open
Abstract
The neuromuscular junction (NMJ) exhibits high morphological and functional plasticity. In the mature muscle, the relative levels of physical activity are the major determinants of NMJ function. Classically, motor neuron-mediated activation patterns of skeletal muscle have been thought of as the major drivers of NMJ plasticity and the ensuing fibre-type determination in muscle. Here we use muscle-specific transgenic animals for the peroxisome proliferator-activated receptor γ co-activator 1α (PGC-1α) as a genetic model for trained mice to elucidate the contribution of skeletal muscle to activity-induced adaptation of the NMJ. We find that muscle-specific expression of PGC-1α promotes a remodelling of the NMJ, even in the absence of increased physical activity. Importantly, these plastic changes are not restricted to post-synaptic structures, but extended to modulation of presynaptic cell morphology and function. Therefore, our data indicate that skeletal muscle significantly contributes to the adaptation of the NMJ subsequent to physical activity.
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Affiliation(s)
- Anne-Sophie Arnold
- Biozentrum, Division of Pharmacology/Neurobiology, University of Basel, Klingelbergstrasse 50/70, CH-4056 Basel, Switzerland
| | - Jonathan Gill
- Biozentrum, Division of Pharmacology/Neurobiology, University of Basel, Klingelbergstrasse 50/70, CH-4056 Basel, Switzerland
| | - Martine Christe
- 1] Biozentrum, Division of Pharmacology/Neurobiology, University of Basel, Klingelbergstrasse 50/70, CH-4056 Basel, Switzerland [2]
| | - Rocío Ruiz
- Department of Medical Physiology and Biophysics, School of Medicine University of Seville, Avda. Sánchez Pizjuan 4, 41009 Sevilla, Spain
| | - Shawn McGuirk
- Department of Biochemistry, Rosalind and Morris Goodman Cancer Centre, McGill University, 3655 promenade Sir William Osler, Montreal, Quebec, Canada H3G 1Y6
| | - Julie St-Pierre
- Department of Biochemistry, Rosalind and Morris Goodman Cancer Centre, McGill University, 3655 promenade Sir William Osler, Montreal, Quebec, Canada H3G 1Y6
| | - Lucía Tabares
- Department of Medical Physiology and Biophysics, School of Medicine University of Seville, Avda. Sánchez Pizjuan 4, 41009 Sevilla, Spain
| | - Christoph Handschin
- Biozentrum, Division of Pharmacology/Neurobiology, University of Basel, Klingelbergstrasse 50/70, CH-4056 Basel, Switzerland
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Svensson K, Handschin C. Modulation of PGC-1α activity as a treatment for metabolic and muscle-related diseases. Drug Discov Today 2014; 19:1024-9. [PMID: 24631683 DOI: 10.1016/j.drudis.2014.02.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 02/27/2014] [Indexed: 01/03/2023]
Affiliation(s)
- Kristoffer Svensson
- Biozentrum, University of Basel, Klingelbergstrasse 50/70, 4056 Basel, Switzerland
| | - Christoph Handschin
- Biozentrum, University of Basel, Klingelbergstrasse 50/70, 4056 Basel, Switzerland.
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Ferguson DP, Dangott LJ, Schmitt EE, Vellers HL, Lightfoot JT. Differential skeletal muscle proteome of high- and low-active mice. J Appl Physiol (1985) 2014; 116:1057-67. [PMID: 24505100 DOI: 10.1152/japplphysiol.00911.2013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Physical inactivity contributes to cardiovascular disease, type II diabetes, obesity, and some types of cancer. While the literature is clear that there is genetic regulation of physical activity with existing gene knockout data suggesting that skeletal muscle mechanisms contribute to the regulation of activity, actual differences in end-protein expression between high- and low-active mice have not been investigated. This study used two-dimensional differential gel electrophoresis coupled with mass spectrometry to evaluate the proteomic differences between high-active (C57L/J) and low-active (C3H/HeJ) mice in the soleus and extensor digitorum longus (EDL). Furthermore, vivo-morpholinos were used to transiently knockdown candidate proteins to confirm their involvement in physical activity regulation. Proteins with higher expression patterns generally fell into the calcium-regulating and Krebs (TCA) cycle pathways in the high-active mice (e.g., annexin A6, P = 0.0031; calsequestrin 1; P = 0.000025), while the overexpressed proteins in the low-active mice generally fell into cytoskeletal structure- and electron transport chain-related pathways (e.g., ATPase, P = 0.031; NADH dehydrogenase, P = 0.027). Transient knockdown of annexin A6 and calsequestrin 1 protein of high-active mice with vivo-morpholinos resulted in decreased physical activity levels (P = 0.001). These data suggest that high- and low-active mice have unique protein expression patterns and that each pattern contributes to the peripheral capability to be either high- or low-active, suggesting that different specific mechanisms regulate activity leading to the high- or low-activity status of the animal.
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Affiliation(s)
- David P Ferguson
- Children's Nutritional Research Center, Baylor College of Medicine, Houston, Texas
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The transcriptional coactivator PGC-1α is dispensable for chronic overload-induced skeletal muscle hypertrophy and metabolic remodeling. Proc Natl Acad Sci U S A 2013; 110:20314-9. [PMID: 24277823 DOI: 10.1073/pnas.1312039110] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Skeletal muscle mass loss and dysfunction have been linked to many diseases. Conversely, resistance exercise, mainly by activating mammalian target of rapamycin complex 1 (mTORC1), promotes skeletal muscle hypertrophy and exerts several therapeutic effects. Moreover, mTORC1, along with peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α), regulates skeletal muscle metabolism. However, it is unclear whether PGC-1α is required for skeletal muscle adaptations after overload. Here we show that although chronic overload of skeletal muscle via synergist ablation (SA) strongly induces hypertrophy and a switch toward a slow-contractile phenotype, these effects were independent of PGC-1α. In fact, SA down-regulated PGC-1α expression and led to a repression of energy metabolism. Interestingly, however, PGC-1α deletion preserved peak force after SA. Taken together, our data suggest that PGC-1α is not involved in skeletal muscle remodeling induced by SA.
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Functional crosstalk of PGC-1 coactivators and inflammation in skeletal muscle pathophysiology. Semin Immunopathol 2013; 36:27-53. [DOI: 10.1007/s00281-013-0406-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 10/29/2013] [Indexed: 02/06/2023]
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Skeletal muscle PGC-1α controls whole-body lactate homeostasis through estrogen-related receptor α-dependent activation of LDH B and repression of LDH A. Proc Natl Acad Sci U S A 2013; 110:8738-43. [PMID: 23650363 DOI: 10.1073/pnas.1212976110] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The peroxisome proliferator-activated receptor-γ coactivator 1α (PGC-1α) controls metabolic adaptations. We now show that PGC-1α in skeletal muscle drives the expression of lactate dehydrogenase (LDH) B in an estrogen-related receptor-α-dependent manner. Concomitantly, PGC-1α reduces the expression of LDH A and one of its regulators, the transcription factor myelocytomatosis oncogene. PGC-1α thereby coordinately alters the composition of the LDH complex and prevents the increase in blood lactate during exercise. Our results show how PGC-1α actively coordinates lactate homeostasis and provide a unique molecular explanation for PGC-1α-mediated muscle adaptations to training that ultimately enhance exercise performance and improve metabolic health.
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41
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Wenz T. Regulation of mitochondrial biogenesis and PGC-1α under cellular stress. Mitochondrion 2013; 13:134-42. [DOI: 10.1016/j.mito.2013.01.006] [Citation(s) in RCA: 177] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Revised: 12/09/2012] [Accepted: 01/11/2013] [Indexed: 12/14/2022]
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Moghadaszadeh B, Rider BE, Lawlor MW, Childers MK, Grange RW, Gupta K, Boukedes SS, Owen CA, Beggs AH. Selenoprotein N deficiency in mice is associated with abnormal lung development. FASEB J 2013; 27:1585-99. [PMID: 23325319 DOI: 10.1096/fj.12-212688] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Mutations in the human SEPN1 gene, encoding selenoprotein N (SepN), cause SEPN1-related myopathy (SEPN1-RM) characterized by muscle weakness, spinal rigidity, and respiratory insufficiency. As with other members of the selenoprotein family, selenoprotein N incorporates selenium in the form of selenocysteine (Sec). Most selenoproteins that have been functionally characterized are involved in oxidation-reduction (redox) reactions, with the Sec residue located at their catalytic site. To model SEPN1-RM, we generated a Sepn1-knockout (Sepn1(-/-)) mouse line. Homozygous Sepn1(-/-) mice are fertile, and their weight and lifespan are comparable to wild-type (WT) animals. Under baseline conditions, the muscle histology of Sepn1(-/-) mice remains normal, but subtle core lesions could be detected in skeletal muscle after inducing oxidative stress. Ryanodine receptor (RyR) calcium release channels showed lower sensitivity to caffeine in SepN deficient myofibers, suggesting a possible role of SepN in RyR regulation. SepN deficiency also leads to abnormal lung development characterized by enlarged alveoli, which is associated with decreased tissue elastance and increased quasi-static compliance of Sepn1(-/-) lungs. This finding raises the possibility that the respiratory syndrome observed in patients with SEPN1 mutations may have a primary pulmonary component in addition to the weakness of respiratory muscles.
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Affiliation(s)
- Behzad Moghadaszadeh
- Division of Genetics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Boston, MA 02115, USA
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Summermatter S, Shui G, Maag D, Santos G, Wenk MR, Handschin C. PGC-1α improves glucose homeostasis in skeletal muscle in an activity-dependent manner. Diabetes 2013; 62:85-95. [PMID: 23086035 PMCID: PMC3526021 DOI: 10.2337/db12-0291] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Metabolic disorders are a major burden for public health systems globally. Regular exercise improves metabolic health. Pharmacological targeting of exercise mediators might facilitate physical activity or amplify the effects of exercise. The peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α) largely mediates musculoskeletal adaptations to exercise, including lipid refueling, and thus constitutes such a putative target. Paradoxically, forced expression of PGC-1α in muscle promotes diet-induced insulin resistance in sedentary animals. We show that elevated PGC-1α in combination with exercise preferentially improves glucose homeostasis, increases Krebs cycle activity, and reduces the levels of acylcarnitines and sphingosine. Moreover, patterns of lipid partitioning are altered in favor of enhanced insulin sensitivity in response to combined PGC-1α and exercise. Our findings reveal how physical activity improves glucose homeostasis. Furthermore, our data suggest that the combination of elevated muscle PGC-1α and exercise constitutes a promising approach for the treatment of metabolic disorders.
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Affiliation(s)
- Serge Summermatter
- Biozentrum, Division of Pharmacology/Neurobiology, University of Basel, Basel, Switzerland
| | - Guanghou Shui
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Daniela Maag
- Division of Clinical Chemistry and Biochemistry, Department of Pediatrics, University Children’s Hospital, University of Zurich, Zurich, Switzerland
| | - Gesa Santos
- Biozentrum, Division of Pharmacology/Neurobiology, University of Basel, Basel, Switzerland
| | - Markus R. Wenk
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Swiss Tropical and Public Health Institute, Basel, Switzerland
| | - Christoph Handschin
- Biozentrum, Division of Pharmacology/Neurobiology, University of Basel, Basel, Switzerland
- Corresponding author: Christoph Handschin,
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44
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Increased insulin sensitivity and distorted mitochondrial adaptations during muscle unloading. Int J Mol Sci 2012; 13:16971-85. [PMID: 23443131 PMCID: PMC3546734 DOI: 10.3390/ijms131216971] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Revised: 11/27/2012] [Accepted: 11/29/2012] [Indexed: 11/17/2022] Open
Abstract
We aimed to further investigate mitochondrial adaptations to muscle disuse and the consequent metabolic disorders. Male rats were submitted to hindlimb unloading (HU) for three weeks. Interestingly, HU increased insulin sensitivity index (ISI) and decreased blood level of triglyceride and insulin. In skeletal muscle, HU decreased expression of pyruvate dehydrogenase kinase 4 (PDK4) and its protein level in mitochondria. HU decreased mtDNA content and mitochondrial biogenesis biomarkers. Dynamin-related protein (Drp1) in mitochondria and Mfn2 mRNA level were decreased significantly by HU. Our findings provide more extensive insight into mitochondrial adaptations to muscle disuse, involving the shift of fuel utilization towards glucose, the decreased mitochondrial biogenesis and the distorted mitochondrial dynamics.
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45
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Pérez-Schindler J, Summermatter S, Salatino S, Zorzato F, Beer M, Balwierz PJ, van Nimwegen E, Feige JN, Auwerx J, Handschin C. The corepressor NCoR1 antagonizes PGC-1α and estrogen-related receptor α in the regulation of skeletal muscle function and oxidative metabolism. Mol Cell Biol 2012; 32:4913-24. [PMID: 23028049 PMCID: PMC3510532 DOI: 10.1128/mcb.00877-12] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Accepted: 09/23/2012] [Indexed: 01/08/2023] Open
Abstract
Skeletal muscle exhibits a high plasticity and accordingly can quickly adapt to different physiological and pathological stimuli by changing its phenotype largely through diverse epigenetic mechanisms. The nuclear receptor corepressor 1 (NCoR1) has the ability to mediate gene repression; however, its role in regulating biological programs in skeletal muscle is still poorly understood. We therefore studied the mechanistic and functional aspects of NCoR1 function in this tissue. NCoR1 muscle-specific knockout mice exhibited a 7.2% higher peak oxygen consumption (VO(2peak)), a 11% reduction in maximal isometric force, and increased ex vivo fatigue resistance during maximal stimulation. Interestingly, global gene expression analysis revealed a high overlap between the effects of NCoR1 deletion and peroxisome proliferator-activated receptor gamma (PPARγ) coactivator 1α (PGC-1α) overexpression on oxidative metabolism in muscle. Importantly, PPARβ/δ and estrogen-related receptor α (ERRα) were identified as common targets of NCoR1 and PGC-1α with opposing effects on the transcriptional activity of these nuclear receptors. In fact, the repressive effect of NCoR1 on oxidative phosphorylation gene expression specifically antagonizes PGC-1α-mediated coactivation of ERRα. We therefore delineated the molecular mechanism by which a transcriptional network controlled by corepressor and coactivator proteins determines the metabolic properties of skeletal muscle, thus representing a potential therapeutic target for metabolic diseases.
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MESH Headings
- Animals
- Male
- Mice
- Mice, Knockout
- Mice, Transgenic
- Models, Biological
- Muscle Contraction/genetics
- Muscle Contraction/physiology
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/physiology
- Nuclear Receptor Co-Repressor 1/deficiency
- Nuclear Receptor Co-Repressor 1/genetics
- Nuclear Receptor Co-Repressor 1/metabolism
- Oxidative Phosphorylation
- Oxygen Consumption
- PPAR delta/metabolism
- PPAR-beta/metabolism
- Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptors, Estrogen/antagonists & inhibitors
- Receptors, Estrogen/genetics
- Receptors, Estrogen/metabolism
- Trans-Activators/antagonists & inhibitors
- Trans-Activators/genetics
- Trans-Activators/metabolism
- Transcription Factors
- ERRalpha Estrogen-Related Receptor
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Affiliation(s)
| | | | | | - Francesco Zorzato
- Departments of Anesthesia and Biomedicine, Basel University Hospital, Basel, Switzerland
- Department of Experimental and Diagnostic Medicine, University of Ferrara, Ferrara, Italy
| | - Markus Beer
- Biozentrum, University of Basel, Basel, Switzerland
| | - Piotr J. Balwierz
- Biozentrum, University of Basel, Basel, Switzerland
- Swiss Institute of Bioinformatics, Basel, Switzerland
| | - Erik van Nimwegen
- Biozentrum, University of Basel, Basel, Switzerland
- Swiss Institute of Bioinformatics, Basel, Switzerland
| | - Jérôme N. Feige
- Novartis Institute for Biomedical Research, Basel, Switzerland
- Laboratory for Integrative and Systems Physiology, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Johan Auwerx
- Laboratory for Integrative and Systems Physiology, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
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Ducreux S, Gregory P, Schwaller B. Inverse regulation of the cytosolic Ca²⁺ buffer parvalbumin and mitochondrial volume in muscle cells via SIRT1/PGC-1α axis. PLoS One 2012; 7:e44837. [PMID: 23028640 PMCID: PMC3441610 DOI: 10.1371/journal.pone.0044837] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Accepted: 08/09/2012] [Indexed: 12/16/2022] Open
Abstract
Skeletal muscles show a high plasticity to cope with various physiological demands. Different muscle types can be distinguished by the force, endurance, contraction/relaxation kinetics (fast-twitch vs. slow-twitch muscles), oxidative/glycolytic capacity, and also with respect to Ca²⁺-signaling components. Changes in Ca²⁺ signaling and associated Ca²⁺-dependent processes are thought to underlie the high adaptive capacity of muscle fibers. Here we investigated the consequences and the involved mechanisms caused by the ectopic expression of the Ca²⁺-binding protein parvalbumin (PV) in C2C12 myotubes in vitro, and conversely, the effects caused by its absence in in fast-twitch muscles of parvalbumin null-mutant (PV⁻/⁻) mice in vivo. The absence of PV in fast-twitch muscle tibialis anterior (TA) resulted in an increase in the peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α) and of its positive regulator, the deacetylase sirtuin 1 (SIRT1). TA muscles from PV⁻/⁻ mice also have an increased mitochondrial volume. Mild ionophore treatment of control (PV-devoid) C2C12 myotubes causing a moderate elevation in [Ca²⁺](c) resulted in an increase in mitochondrial volume, together with elevated PGC-1α and SIRT1 expression levels, whilst it increased PV expression levels in myotubes stably transfected with PV. In PV-expressing myotubes the mitochondrial volume, PGC-1α and SIRT1 were significantly lower than in control C2C12 myotubes already at basal conditions and application of ionophore had no effect on either one. SIRT1 activation causes a down-regulation of PV in transfected myotubes, whilst SIRT1 inhibition has the opposite effect. We conclude that PV expression and mitochondrial volume in muscle cells are inversely regulated via a SIRT1/PGC-1α signaling axis.
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Affiliation(s)
- Sylvie Ducreux
- Unit of Anatomy, Department of Medicine, University of Fribourg, Fribourg, Switzerland
| | - Patrick Gregory
- Unit of Anatomy, Department of Medicine, University of Fribourg, Fribourg, Switzerland
| | - Beat Schwaller
- Unit of Anatomy, Department of Medicine, University of Fribourg, Fribourg, Switzerland
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Abstract
The increasing prevalence of obesity and its comorbidities represents a major threat to human health globally. Pharmacological treatments exist to achieve weight loss, but the subsequent weight maintenance is prone to fail in the long run. Accordingly, efficient new strategies to persistently control body weight need to be elaborated. Exercise and dietary interventions constitute classical approaches to reduce and maintain body weight, yet people suffering from metabolic diseases are often unwilling or unable to move adequately. The administration of drugs that partially mimic exercise adaptation might circumvent this problem by easing and supporting physical activity. The thermogenic peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α) largely mediates the adaptive response of skeletal muscle to endurance exercise and is a potential target for such interventions. Here, we review the role of PGC-1α in mediating exercise adaptation, coordinating metabolic circuits and enhancing thermogenic capacity in skeletal muscle. We suggest a combination of elevated muscle PGC-1α and exercise as a modified approach for the efficient long-term control of body weight and the treatment of the metabolic syndrome.
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Affiliation(s)
- S Summermatter
- Biozentrum, Division of Pharmacology/Neurobiology, University of Basel, Basel, Switzerland
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